<template>
  <div class="cart">
    <h4>全部商品</h4>
    <div class="cart-main">
      <div class="cart-th">
        <div class="cart-th1">全部</div>
        <div class="cart-th2">商品</div>
        <div class="cart-th3">单价（元）</div>
        <div class="cart-th4">数量</div>
        <div class="cart-th5">小计（元）</div>
        <div class="cart-th6">操作</div>
      </div>
      <div class="cart-body">
        <ul class="cart-list" v-for="good in cartList" :key="good.id">
          <li class="cart-list-con1">
            <input type="checkbox" name="chk_list" :checked="good.isChecked" @change="checkGood(good.skuId,$event.target.checked)"/>
          </li>
          <li class="cart-list-con2">
            <img :src="good.imgUrl"/>
            <div class="item-msg">
              {{ good.skuName }}
            </div>
          </li>
          <li class="cart-list-con3">
            <div class="item-txt">{{ good.sourceType }}</div>
          </li>
          <li class="cart-list-con4">
            <span class="price">{{ good.skuPrice }}</span>
          </li>
          <li class="cart-list-con5">
            <a href="javascript:void(0)" class="mins" @click="changeGoodNum(good.skuId,good.skuNum,good.skuNum-1)">-</a>
            <input
                autocomplete="off"
                type="text"
                :value="good.skuNum"
                @change="changeGoodNum(good.skuId,good.skuNum,good.skuNum)"
                minnum="1"
                class="itxt"
            />
            <a href="javascript:void(0)" class="plus" @click="changeGoodNum(good.skuId,good.skuNum,good.skuNum+1)">+</a>
          </li>
          <li class=" cart-list-con6">
            <span class="sum">{{ good.skuNum * good.skuPrice }}</span>
          </li>
          <li class="cart-list-con7">
            <a href="#none" class="sindelet" @click="deleteGood(good.skuId)">删除</a>
            <br/>
            <a href="#none">移到收藏</a>
          </li>
        </ul>
      </div>
    </div>
    <div class="cart-tool">
      <div class="select-all">
        <input class="chooseAll" type="checkbox" v-model="isCheckAll" @change="checkAllGoods"/>
        <span>全选</span>
      </div>
      <div class="option">
        <a class="pointer" @click="deleteSelectGoods">删除选中的商品</a>
        <a class="pointer">移到我的关注</a>
        <a class="pointer">清除下柜商品</a>
      </div>
      <div class="money-box">
        <div class="chosed">已选择 <span>0</span>件商品</div>
        <div class="sumprice">
          <em>总价（不含运费） ：</em>
          <i class="summoney">{{ totalPrice }}</i>
        </div>
        <div class="sumbtn">
          <a class="sum-btn pointer" target="_blank">结算</a>
        </div>
      </div>
    </div>
  </div>
</template>

<script>

import { checkCartSku, checkManyCartSku, deleteManyCartSku, deleteSingleCartSku, getCartList, updateCartNum } from '@/api';

export default {
  name: 'ShopCart',
  data () {
    return {
      cartList: [],
    };
  },
  mounted () {
    //1.初始化请求数据
    this.getCartGoods();
  },
  computed: {
    totalPrice () {
      return this.cartList.reduce((prev, curr) => {
        prev = curr.skuNum * curr.skuPrice;
        return prev;
      }, 0);
    },
    isCheckAll: {
      get () {
        if (this.cartList.length < 1) return false;
        return this.cartList.every(({ isChecked }) => isChecked);
      },
      async set (val) {
        await checkManyCartSku(this.cartList.map(({ skuId }) => skuId), val ? 1 : 0);
        await this.getCartGoods();
      },
    },
  },
  methods: {
    async getCartGoods () {
      this.cartList = (await getCartList())[0].cartInfoList;
    },
    // 选中单个商品
    async checkGood (skuId, action) {
      await checkCartSku(skuId, action ? 1 : 0);
      await this.getCartGoods();
    },
    // 选中所有商品
    async checkAllGoods (isChecked) {
      let goodIds = this.cartList.map(({ skuId }) => skuId);
      await checkManyCartSku(goodIds, isChecked);
      await this.getCartGoods();
    },
    // 修改购买商品数量
    async changeGoodNum (skuId, skuNum, newSkuNum) {
      if (newSkuNum < 1) return;
      // 判断 增加数量 还是 减少数量
      // if 原数值 < 新数值 则为增加
      // else 原数组 > 新数值 则为减少
      let action = skuNum < newSkuNum ? 1 : -1;
      if (skuNum === newSkuNum) action = 0;
      await updateCartNum(skuId, action);
      await this.getCartGoods();
    },
    // 删除所有商品
    async deleteSelectGoods () {
      const selectedIds = this.cartList.reduce((prev, curr) => {
        if (curr.isChecked) {
          prev.push(curr.skuId);
        }
        return prev;
      }, []);
      await deleteManyCartSku(selectedIds);
      await this.getCartGoods();
    },
    // 删除单个商品
    async deleteGood (skuId) {
      await deleteSingleCartSku(skuId);
      this.cartList = [];
      await this.getCartGoods();
    },
  },
};
</script>

<style lang="less" scoped>
.pointer {
  cursor: pointer;

  &:hover {
    color: deepskyblue !important;
  }
}

.cart {
  width: 1200px;
  margin: 0 auto;

  h4 {
    margin: 9px 0;
    font-size: 14px;
    line-height: 21px;
  }

  .cart-main {
    .cart-th {
      background: #f5f5f5;
      border: 1px solid #ddd;
      padding: 10px;
      overflow: hidden;

      & > div {
        float: left;
      }

      .cart-th1 {
        width: 25%;

        input {
          vertical-align: middle;
        }

        span {
          vertical-align: middle;
        }
      }

      .cart-th2 {
        width: 25%;
      }

      .cart-th3,
      .cart-th4,
      .cart-th5,
      .cart-th6 {
        width: 12.5%;
      }
    }

    .cart-body {
      margin: 15px 0;
      border: 1px solid #ddd;

      .cart-list {
        padding: 10px;
        border-bottom: 1px solid #ddd;
        overflow: hidden;

        & > li {
          float: left;
        }

        .cart-list-con1 {
          width: 4.1667%;
        }

        .cart-list-con2 {
          width: 25%;

          img {
            width: 82px;
            height: 82px;
            float: left;
          }

          .item-msg {
            float: left;
            width: 150px;
            margin: 0 10px;
            line-height: 18px;
          }
        }

        .cart-list-con3 {
          width: 20.8333%;

          .item-txt {
            text-align: center;
          }
        }

        .cart-list-con4 {
          width: 12.5%;
        }

        .cart-list-con5 {
          width: 12.5%;

          .mins {
            border: 1px solid #ddd;
            border-right: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
          }

          input {
            border: 1px solid #ddd;
            width: 40px;
            height: 33px;
            float: left;
            text-align: center;
            font-size: 14px;
          }

          .plus {
            border: 1px solid #ddd;
            border-left: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
          }
        }

        .cart-list-con6 {
          width: 12.5%;

          .sum {
            font-size: 16px;
          }
        }

        .cart-list-con7 {
          width: 12.5%;

          a {
            color: #666;
          }
        }
      }
    }
  }

  .cart-tool {
    overflow: hidden;
    border: 1px solid #ddd;

    .select-all {
      padding: 10px;
      overflow: hidden;
      float: left;

      span {
        vertical-align: middle;
      }

      input {
        vertical-align: middle;
      }
    }

    .option {
      padding: 10px;
      overflow: hidden;
      float: left;

      a {
        float: left;
        padding: 0 10px;
        color: #666;
      }
    }

    .money-box {
      float: right;

      .chosed {
        line-height: 26px;
        float: left;
        padding: 0 10px;
      }

      .sumprice {
        width: 200px;
        line-height: 22px;
        float: left;
        padding: 0 10px;

        .summoney {
          color: #c81623;
          font-size: 16px;
        }
      }

      .sumbtn {
        float: right;

        a {
          display: block;
          position: relative;
          width: 96px;
          height: 52px;
          line-height: 52px;
          color: #fff;
          text-align: center;
          font-size: 18px;
          font-family: "Microsoft YaHei";
          background: #e1251b;
          overflow: hidden;
        }
      }
    }
  }
}
</style>
